Cairo - Egypt is battling militant groups who often target police and army personnel. Although concentrated in northern Sinai, attacks in the mainland are regular occurrences. A policeman and a civilian were killed on Thursday night when gunmen in a vehicle opened fire at a security checkpoint in Upper Egypt's Luxor governorate, a security source told state news agency MENA. The attack started when police personnel manning the checkpoint, located in the Esna area, attempted to stop a passing car. Shots were then fired from within the car. Three civilians who happened to be in the area when the attack took place were also injured. Security forces arrested one of the assailants and found weapons and explosives in his possession, according to the source, who spoke on condition of anonymity. National Security Services in Luxor began to interrogate one of the terrorists involved in the terrorist attack, who was arrested on Thursday evening in Esna District, southern Luxor province. The terrorist's name is ‘Eid Hussein Eid', 35 years old, from Badr District in Beheira Province (Northern Cairo). Watch: When one of the perpetrators of Esna terrorist attack was arrested